Finding the Fourth Proportional to 1,158.72, 1,598.05 and 864.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.72 : 1,598.05 = 864.69 : x
2. Step 2: Convert to fraction form
   1,158.72/1,598.05 = 864.69/x
3. Step 3: Cross multiply
   1,158.72x = 1,598.05 × 864.69
4. Step 4: Simplify right side
   1,158.72x = 1,381,817.85
5. Step 5: Solve for x
   x = 1,381,817.85/1,158.72
6. Step 6: Final answer
   x = 1,192.54